PROFESSIONAL SUMMARY:

• Over 7 years of experience as software developer in design, development, deploying and supporting large scale distributed systems
• Over 2 years of extensive experience as Cassandra DBA
• Datastax certified Apache Cassandra Developer.
• Expertise in using various Hadoop infrastructures such as Spark, Kafka, MapReduce, Hive, NiFi, StreamSets, Storm, Drill and Flume
• Experience in working with MapR, Cloudera and Hortonworks Distributions
• In depth knowledge of Hadoop Architecture and Hadoop daemons such as Name Node, Secondary Name Node, Data Node, Job Tracker and Task Tracker.
• Excellent Knowledge in the Architecture of Cassandra and HBase.
• Hands on experience in using NoSQL databases like CouchBase and Cassandra
• Familiar with NoSQL Data Modelling Techniques
• Experience in Spark SQL and Spark Streaming using Scala
• Experience integration of Kafka with Storm and Spark for real time data processing.
• Experience in using NiFi and Streamsets to automate the data movement between different stages
• Worked with Data Formats such as JSON, Avro, Parquet
• Strong experience in core Java, J2EE, SQL and Restful web services.
• Extensive experience in developing applications using Core Java and multi - threading.
• Excellent Team player with very good attitude and excellent interpersonal skills with analytical abilities, communication skills

TECHNICAL SKILLS:

Hadoop Ecosystem: HDFS, MapReduce, Spark, Hive, Pig.

Programming Skills: C, C++, Java, JavaScript, Scala and Python.

NoSQL Databases: Cassandra, Couchbase

Relational Databases: Oracle 10g/11g, MySQL, SQL server

Operating Systems: MAC OS X, Linux, Windows, Ubuntu

IDE tools: Eclipse, Net beans, STS, Visual Studio, Scala IDE

WORK EXPERIENCE:

Confidential, Clayton, MO

Cassandra DBA

Responsibilities:

• Excellent understanding of Cassandra Architecture, consistency level, compaction strategies and data modeling
• Used Cassandra nodetool to manage Cassandra cluster.
• Administered Cassandra cluster using Datastax OpsCenter and monitored CPU usage, memory usage and health of nodes in cluster.
• Worked on tuning Bloom filters and configured compaction strategy based on the use case.
• Familiar with Cassandra performance tuning and load testing.
• Shared the Knowledge of Cassandra to the team and explained the architecture and its internals.
• Created documentation for benchmarking the Cassandra cluster for the designed tables.
• Worked on Linux shell scripts for business process and loading data from Oracle to Cassandra.
• Evaluated business requirements and prepared detailed specifications that follow project guidelines required to develop the application.
• Analyzed the log files to determine the flow of the application and trouble shoot the issues.
• Configured internode communication between Cassandra nodes and client using SSL encryption.
• Running weekly repairs to the keyspaces using customized scripts and cluster wide repair bi-weekly.
• Experienced in setting up alerts and scheduling backups through Opscenter.
• Hosted multiple applications on Cassandra with different keyspace strategies, replication factor and consistency levels based on the business requirement in order to meet the SLA.

Environment: Cassandra 2.1, DevCenter, CQL, NodeTool, UNIX, Shell-Scripting, Spark, GIT.

Confidential, Detroit, MI

Cassandra Developer/DBA

Responsibilities:

• Involved in Cassandra Data modelling going through the phases of creating Conceptual model, Application flow, Logical model, Physical Optimization, Final Physical model.
• Installed and Configured DataStax OpsCenter for Cassandra Cluster maintenance and alerts
• Created Keyspace and Tables from the data model using DataStax DevCenter
• Imported data from various resources to the Cassandra cluster using Java API
• Worked on tuning Bloom filters and configured compaction strategy based on the use case.
• Worked with CQL (Cassandra Query Language), for retrieving the data present in Cassandra cluster by running queries in CQL.
• Tested the application and the cluster with different consistency levels to check for the writes and reads performance with respective to consistency Level.
• Experience in working with CCM (Cassandra Cluster Manager) and Cassandra node tool
• Committed codes into GIT
• Interact with SCRUM team developers, programmers, tester, product owners and stake holders to deliver right value of the project at the end of each sprint

Environment: CDH 5, Cassandra 2.0, Datastax 4.0, HDFS, MapReduce, Hive, Pig, Oozie, Sqoop, Git, Maven

Confidential, Dallas,TX

Java Developer

Responsibilities:

• Application system design over Java/J2EE technologies with security, robustness, transaction management as prime goal.
• Design and developed configuration output in XML and PDF format.
• Designed and developed configuration wizard using Spring MVC, used Spring Web Flow to create business rule based flow mechanism, and configuration entity model in JPA.
• Created detail design documents for use cases of the system that are signed off by business users.
• Provide estimate for new modules and do impact analysis for engineering change requests.
• Leading and mentoring developers in achieving project time lines and help them to produce quality code based standards and providing technical solutions to critical issues.
• Responsible for team member code reviews, provided guidelines, and followed SDLC for the life cycle of the project.

Environment: UNIX, Java, JSP, Servlets, Oracle, Apache Tomcat, Maven, XML, spring MVC

Confidential

Java developer

Responsibilities:

• Participate in Requirement, Design, Development and Deployment sessions
• Involved in the technical design and created the detail design artifacts such as Use Case Diagrams, Class diagrams and Sequence diagrams
• Responsible for design and development of Web Application in J2EE using Struts MVC Framework
• Involved in creating & consuming SOAP based & Restful web services
• Used Web Services for communication between the different internal applications
• Used SOAP for the communication between the different internal applications
• Developed the XML schema and Web Services for the data maintenance and structures
• Involved in designing test plans, test cases and overall Unit testing of the system
• Design and development of Web pages using HTML, CSS including Ajax controls and XML.
• Object Oriented Analysis and Design using UML include development of class diagrams Sequence diagrams and state diagrams and implemented these diagrams in Microsoft Visio and OmniGraffle
• Used DB2 as the database and wrote SQL & PL-SQL
• Used SVN for code version management.

Environment: Struts, HTML, CSS, Java, J2EE, JSP, XML, Eclipse, WebLogic, JavaScript, MySQL